Portion of an article of footwear



FIG. 1 is a front perspective view of my design for a portion of anarticle of footwear;

FIG. 2 is a top view of the portion of an article of footwear of FIG. 1;

FIG. 3 is a lateral view of the portion of an article of footwear ofFIG. 1;

FIG. 4 is a medial view of the portion of an article of footwear of FIG.1;

FIG. 5 is a front elevational view of the portion of an article offootwear of FIG. 1; and,

FIG. 6 is a rear elevational view of the portion of an article offootwear of FIG. 1.

The uneven broken lines immediately adjacent to the shaded regionrepresent an unclaimed boundary of the design. The remaining brokenlines shown in the accompanying drawings of the portion of an article offootwear are for illustrative purposes only and form no part of theclaimed design.

The ornamental design for a portion of an article of footwear, as shownand described.